A chocolate cake does not need stacked layers to make dessert feel like an occasion. This chocolate cake recipe bakes in one rectangular pan, with a soft cocoa crumb and a thin buttercream finish. The batter comes together with a whisk; the only mixer work is a short beating for the frosting.
For an easy-to-serve chocolate cake, use natural cocoa, weigh the flour, and stop baking when a toothpick shows a few moist crumbs. Cool the cake completely before spreading on the cocoa buttercream.
The hot water loosens the batter, so do not mistake its pourable consistency for a missing scoop of flour. I’d take a thin, even frosting layer over a tower of icing here: it gives each bite chocolate flavor without hiding the cake. A metal 9-by-13-inch pan also makes portioning straightforward, with no layers to level or transfer.
Serving suggestions for this chocolate cake recipe
Cut the cooled cake into sixteen squares and lift them out with a narrow spatula. A clean knife makes a tidier edge than a hurried sawing motion; wipe it between cuts if frosting starts to collect. Let refrigerated slices stand briefly before serving so the buttercream is less firm.
- For a simple dessert: serve the cake on its own, with coffee, tea or a glass of milk.
- For a fresh contrast: add a few washed berries to individual plates rather than decorating the whole pan ahead.
- For a dessert table: cut smaller pieces and label the cake for wheat, egg and milk allergens.
If you are choosing between baked desserts, apple crumble offers warm fruit and a buttery topping, while carrot cake brings spice and a cream cheese finish. I’d choose this chocolate version when an easy square slice matters more than elaborate decoration. There is room for a birthday candle without an engineering project.
Keep the presentation simple and the portions consistent; a soft crumb and a little frosting are enough.
Variations and cocoa choices
Use unsweetened natural cocoa for the ingredient balance written below. Cocoa types differ in acidity as well as color, as King Arthur Baking’s cocoa explanation describes. A darker powder is not automatically a better fit, and hot cocoa drink mix contains sugar and other ingredients that make it an unsuitable replacement.
| Choice | Effect | Practical limit |
|---|---|---|
| Natural unsweetened cocoa | The intended cocoa flavor and acidity | Use the amount in the card |
| Hot brewed coffee for water | Adds a coffee note | Use the same measured volume; keep away from children if caffeine matters |
| Leave the cake unfrosted | Less sweetness and a lighter finish | Nutrition and cost will change |
| Different pan shape | Changes batter depth | Do not copy the same baking time blindly |
- Dense or heavy crumb: check the flour measurement and the freshness of the leaveners before adding more liquid next time.
- Dry edges: start checking at the early end of the baking range. A dark pan can brown the perimeter sooner.
- Frosting that slides: the cake or butter may be too warm. Let both cool to a workable consistency before continuing.
Make small flavor changes while keeping the flour, liquid and leavening balance intact.
Health benefits and portion perspective
This is a dessert, and its most useful nutritional information is the portion and the ingredients it contains. Milk and eggs contribute some protein, but sugar, oil and butter supply much of the energy. Cocoa does not make a frosted cake a treatment or a substitute for other foods.
- Read the serving: the estimate is for one of sixteen frosted squares, without berries, ice cream or drinks.
- Account for added sugar: both the cake and frosting contain it. The FDA distinguishes added sugars from sugars naturally present in milk and fruit.
- Handle batter safely: keep flour and raw egg away from ready-to-eat food, and wash equipment before making frosting.
Do not taste the uncooked batter. The FDA’s flour safety guidance explains why flour needs cooking even when it looks harmless. Cover and refrigerate the finished cake, and freeze extra individual slices if the pan is more than you need. Bring out only the portions you intend to serve.
Enjoy a deliberate slice for its chocolate flavor, with clear portions and safe preparation rather than a health halo.
Bottom Line
This chocolate cake recipe keeps the work in one pan and the focus on cocoa. Measure carefully, check the center early, and let the cake cool fully before frosting for neat, soft squares.
Chocolate Cake Recipe
Ingredients
- 2 1/2 cups all-purpose flour 300 g; spoon and level if not weighing
- 1 1/2 cups granulated sugar 300 g
- 3/4 cup natural unsweetened cocoa powder 60 g
- 2 teaspoons baking powder
- 1 teaspoon baking soda
- 1/2 teaspoon fine salt
- 2 large eggs
- 1 cup whole milk 240 ml
- 1/2 cup neutral oil 120 ml, about 110 g, plus a little for pan
- 2 teaspoons vanilla extract
- 1 cup hot water 240 ml, just off the boil
- 6 tablespoons unsalted butter 85 g, softened
- 1 1/2 cups powdered sugar 180 g, sifted
- 1/4 cup natural unsweetened cocoa powder 25 g, sifted
- 3 tablespoons whole milk 45 ml, divided
- 1 teaspoon vanilla extract
Equipment
- 1 9-by-13-inch metal baking pan
- 2 Mixing bowls
- 1 Whisk
- 1 Hand mixer
- 1 Kitchen scale
- 1 Cooling rack
- 1 Spatula
Instructions
- Heat the oven to 350°F (175°C), with a rack in the middle. Lightly grease a 9-by-13-inch metal baking pan. Measure the ingredients before mixing; keep raw flour and eggs away from the frosting ingredients.
- In a large bowl, whisk the flour, granulated sugar, cake cocoa, baking powder, baking soda and salt until evenly combined and free of cocoa lumps.
- In a second bowl, whisk the eggs, cake milk, oil and cake vanilla. Add to the dry ingredients and whisk just until combined. Carefully pour in the hot water in two additions, stirring gently until smooth. The batter will be thin; do not add extra flour. Do not taste raw batter.
- Pour into the prepared pan and bake for 30–40 minutes, starting to check at 30 minutes. The center should spring back lightly and a toothpick inserted in the middle should come out with a few moist crumbs, not wet batter. If the center is still wet, continue in 3-minute intervals.
- Set the pan on a cooling rack and cool completely, about 90 minutes or longer if needed. Do not frost a warm cake.
- For the frosting, beat the softened butter with a hand mixer for about 1 minute. Add powdered sugar, frosting cocoa, 2 tablespoons of the frosting milk and frosting vanilla. Beat on low until combined, then medium for 1–2 minutes. Add the remaining tablespoon milk a teaspoon at a time only as needed for a soft spreadable consistency.
- Spread the frosting thinly over the cooled cake. Cut into 16 squares. Cover and refrigerate, then let individual slices stand briefly before serving. For best quality, use within 3–4 days or freeze wrapped portions for up to 2 months.
Nutrition
Video
Notes
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Let us know how it turned out!Hi, I’m Emily Pocker! I share recipes and food guides here at Recipes360 to help you find everyday meal inspiration and feel more confident in the kitchen. My goal is to make cooking approachable, enjoyable, and full of flavor.